/Engine/Plugins/Editor/UVEditor/Source/UVEditorTools/Public/Selection/UVToolSelection.h
Utility method to convert element ids from those belonging to the applied mesh to those belonging to equivalent ids on the unwrapped mesh
static [TArray](API\Runtime\Core\Containers\TArray)< int32 > ConvertAppliedElementIdsToUnwrappedElementIds ( [EType](API\Plugins\UVEditorTools\Selection\FUVToolSelection\EType) SelectionMode, const [FDynamicMesh3](API\Runtime\GeometryCore\DynamicMesh\FDynamicMesh3) & AppliedMesh, const [FDynamicMesh3](API\Runtime\GeometryCore\DynamicMesh\FDynamicMesh3) & UnwrapMesh, const [FDynamicMeshUVOverlay](API\Runtime\GeometryCore\DynamicMesh\FDynamicMeshUVOverlay) & UVOverlay, const [TArray](API\Runtime\Core\Containers\TArray)< int32 > & IDsIn, [TArray](API\Runtime\Core\Containers\TArray)< int32 > & AppliedOnlyElementIds )